Filariasis is a tropical disease which is endemic in Indonesia. In Langkat Regency there are still many cases of filariasis that are not monitored by health care workers. Filariasis makes an excessive immune response that causes "eosinophilic inflammation". This syndrome is called "tropical pulmonary eosinophilia" (TPE), where patients come with a cough, with or without breathless and eosinophilia. Micorfilariae live in the blood vessel and lymph vessel. Until now, there is no research about how microfilariae get the nutrition. Whether these microfilariae consume lymphatic fluid or blood cells. The study design is cross-sectional with a sample of seven filariasis sufferers and seven control characteristics adjusted. The sampling technique is Total Sampling. Data was analyzed using the Spearman Correlation test, after normality testing with Shapiro Wilk.

Keywords : Filariasis, Complete Blood Count, Eosinophils, Leukocytes